Transaction not yet indexed

551MK5wY39i37dLQqdGNPLpKFFUofKUjcUH8vJW1bjJd68CB6MG3rWGSMvD4ktRGZt8xvSUqbXxAPXG7pdFgXeo7

The transaction signature is valid but not yet indexed by this RPC node, or the transaction failed before inclusion.